befunge98, 51 bytes

Result

AC

Duration

1020ms

Code [DL]

&1-&:v,"*"<
-"*",>1-:#^_!9+"*",,\:!#@_1-:2g80p\:1
*

stdin

16
24

stdout

************************
*                      *
*                      *
*                      *
*                      *
*                      *
*                      *
*                      *
*                      *
*                      *
*                      *
*                      *
*                      *
*                      *
*                      *
************************

stderr